Radiator.



No. 737,494. PATENTED AUG. 25, 1903. A

0. 1). SANBORN & E. 0. FOX. RADIATOR.

APPLICATION PILBDOOT. 4, 1902.

N0 MODEL.

Wfzesaea Il'o. 737,494.

UNITED STATES,

Patented August 25, 1903.

CHARLES D. SANBORN, OF DETROIT,

MICHIGAN, AND ERNEST 0. FOX, OF

CLEVELAND, OHIO.

RADIATOR.

SPECIFICATION forming part of Letters Patent No. 737,494, dated August 25, 1903.

Application filed October 4, 1902.

To all whom it may concern:

Beitknown that we, CHARLES D. SANBORN, a resident of Detroit, county of Wayne, State of Michigan, and ERNEST 0. FOX, a resident of Cleveland, county of Ouyahoga, State of Ohio, citizens of the United States, have invented certain new and useful Improvements in Radiators, of which we hereby declare the following to be a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same. i 7

Our invention has especial reference to heatradiating devices attached to gas or other stoves and comprises a drum superimposed upon the burner. This is separated vertically into two chambers, one for air-admission from below, and the other is provided with outlet-tubes extending from the vertical air-passage to the exterior air. Through these tubes a current of hot air passes to the room freshly supplied from below, so as to insure thoroughly heating the entire atmosphere of the room.

Our invention consists, further, in the arrangement and construction of the various parts, as hereinafter described, shown in the accompanying drawings, and specifically pointed out in the claims.

In the accompanying drawings, Figure 1 is a front view of the device arranged for heatin g by means of a gas-burner. Fig. 2 is a vertical central section of the same. Fig. 3 is a view of the device inserted intoa smokepipe, and Fig. 4 shows an open top in place of the closed top shown in Fig. 2. Fig. 5 is a sectional view of joint for heating-tube.

In the views, 1 is a drum or shell; 2, the partition; 3, the circulating-tubes 4, the bottom, which is provided with an opening through which the cool air enters the passage 5, which is separated from the body of the drum by means of the partition. 6 is the burner or other source of heat, and 7 the pipe through which gas is conveyed to the burner. 8 is a cover placed over all.

The action of the device is obvious. The

heat from the burner will raise the temperature of the body portion 1 of the drum and the tubes 3 with the air in them, as well as the upper portion of the passage 5. The air Serial No. 126,879. (No model.)

in the upper portion of the passage and in the tubes will then become rarefied and will rise and pass out of the tubes 3 into the room in which the radiator stands, thus causing an inward flow of cold air from the bottom, a constant circulation being obtained and constant outward flow of hot air into the room. The top may be closed, as in Fig. 2, or open,

as in Fig. 4, or the radiator may be inserted between two joints of the stovepipe, as shown in Fig. 3, without departing from the spirit of our invention, although the upper end of the vertical air-passage should be closed in all cases.

It will be seen that the radiators are made of sheet metal and are rectangular in shape. Also the tubes are sheet metal, and it is extremely essential that the metal sheets in which the tubes are inserted should be bound together and to the tube extremities, so that they cannot warp and buckle away from the tubes. To obviate any possibility of this,we employ a special form of joint for the tubes, by means of which'the metal sheets are inclosed firmly and cannot slide upon the tubes. This construction is clearly seen in Figs. 2 and 5,where 9 represents crimped portions of the tube, which form annular ridges adapted to engage the inner surfaces of the metal sheets forming the wall of the chamber and partition, respectively. 10 represents flanges turned about the outer edges of the openings in the metal sheets. Ihus between the annular ridges on the tubes and the outer flanges an air and gas tight joint is formed, which also serves to maintain the parts in rigid contact. The tubes, provided with annular crimps 9 near either end, are first inserted in the holes in the metal sheets, and the flanges 10 are 0 then turned-down closely against the metal sheets.

Having described our invention, what we claim as new, and desire to secure by Letters Patent, is Y 1. A radiator comprising a drum, a vertical partition in the drum separating it into a heating-chamber, and an air-shaft, the said partition extending from the top to the bottom of the drum, a cover over the drum, a

burner underneath the heating-chamber, and air-tubes extending through the heatingchamber and connecting the air-shaft with the air exterior to the heating-chamber, and air;tight joints for the tubes in the Walls of said chambers, substantially as described.

2. A radiator comprising a vertical drum having walls of sheet metal, a cover thereon, a vertical partition of sheet metal separating said drum into heatingchamber and airshaft, both open at the bott0m, a burner under the heating-chamber, and horizontal airtube's passing through said heating-chamber and provided with annularlocking crimps and flanges at their outer extremities between which the sheet-metal wall of the drum and the partition are inclosed, substantially 15 as described.

In testimony whereof We hereto set our hands this 11th day of September, 1902.

- CHAS. D. SANBORN.

ERNEST 0. FOX.

Witnesses:

WM. M. MONROE, R. ZBORNIK. 

